Getting a result feedback from a stored procedure in Entity Framework

Question

In a SQL Server 2008 I have a simple stored procedure moving a bunch of records to another table:

CREATE PROCEDURE [dbo].MyProc(@ParamRecDateTime [datetime])
AS
         


        

Answer 1

One way to do it is to call ExecuteStoreCommand, and pass in a SqlParameter with a direction of Output:

var dtparm = new SqlParameter("@dtparm", DateTime.Now);
var retval = new SqlParameter("@retval", SqlDbType.Int);

retval.Direction = ParameterDirection.Output;

context.ExecuteStoreCommand("exec @retval = MyProc @dtparm", retval, dtparm);

int return_value = (int)retval.Value;

Originally I tried using a direction of ReturnValue:

retval.Direction = ParameterDirection.ReturnValue;

context.ExecuteStoreCommand("MyProc @dtparm", retval, dtparm);

but retval.Value would always be 0. I realized that retval was the result of executing the MyProc @dtparm statement, so I changed it to capture the return value of MyProc and return that as an output parameter.